31116549 has 4 divisors (see below), whose sum is σ = 41488736. Its totient is φ = 20744364.

The previous prime is 31116523. The next prime is 31116559. The reversal of 31116549 is 94561113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94561113 = 3 ⋅31520371.

It is not a de Polignac number, because 31116549 - 2⁵ = 31116517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31116559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5186089 + ... + 5186094.

It is an arithmetic number, because the mean of its divisors is an integer number (10372184).

Almost surely, 2^31116549 is an apocalyptic number.

It is an amenable number.

31116549 is a deficient number, since it is larger than the sum of its proper divisors (10372187).

31116549 is a wasteful number, since it uses less digits than its factorization.

31116549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10372186.

The product of its digits is 3240, while the sum is 30.

The square root of 31116549 is about 5578.2209529562. The cubic root of 31116549 is about 314.5312554505.

The spelling of 31116549 in words is "thirty-one million, one hundred sixteen thousand, five hundred forty-nine".